Actor. He was best known for playing the character roles of bartenders, bidders, soldiers, Nazis, doormen, and wardens. He will be best remembered for his role as 'Steffen' in the adventure crime mystery film, "International Crime" (1938). The film which was directed by Charles Lamont, written for the screen by Jack Netteford and John W. Krafft, and which also starred Rod La Rocque, Astrid Allwyn, and Thomas E. Jackson, tells the story of Lamont Cranston (Rod La Rocque), an amateur criminologist and detective, with a daily radio program, sponsored by the Daily Classic newspaper, who has developed a friendly feud that sometimes passes the friendly stage with Police Commissioner Weston (Thomas E. Jackson). He complains to his managing editor, Edward Heath (Oscar O'Shea), over the problems that have developed in his department since Phoebe Lane (Astrid Allwyn) has been hired as his assistant. He is advised to forget it since she is the publisher's niece. During his broadcast about Honest John (William Pawley), a famous safe cracker who has served his time, Phoebe gives him a note that the Metropolitan Theatre is to be robbed at eight o'clock and she is so insistent that he adds it as his closing note. Off the air, he learns she got the information from a man she met in a café who had an honest face. Cranston goes to the theatre where Weston and his men have gathered and, of course, nothing happens but, across town, a safe is blown at the home of international banker Gerald Morton (John St. Polis) and the banker is killed. Cranston arrives there ahead of the police and discovers enough evidence to show him that it wasn't just a simple robbery with the banker accidentally killed. The irate Weston has him jailed as a material witness, but Phoebe comes through with a habeas corpus in time for him to make his broadcast. Honest John crashes into the studio with a gun and demands that Cranston exonerates him over the air from the police suspicion that he committed the robbery. Weston rushes to the studio but Honest John has escaped. Cranston takes Phoebe on a tour of night clubs hoping she will spot the man who gave her the robbery message. She does and Cranston poses as a new arrival from Europe and learns that the man is Flotow (Wilhelm von Brincken) and his companion is Starkov (Tenen Holtz'). They make a date for lunch the next day. While they are waiting for him to join them for lunch, Cranston breaks into Flathow's apartment where he meets Phoebe who also has had the same idea. A phone call is answered and Morton's butler says there is a meeting at the Morton home that afternoon. He was born as Walter J. Bohnhoff (his names is also listed as Walter Emil Carl Bohnhoff and Joachim Walter Hans Bohnhoff), in Lübeck, Stadtkreis Lübeck, Schleswig-Holstein, Germany, to Joachim Bohnhoff and his wife Doris Meyer Bohnhoff on September 20, 1888. He was educated in his native Germany and eventually moved to the United States and arrived in New York City on November 14, 1907. He worked as an accountant for a time, was drafted during World War I but never served, and eventually became a stage actor. He changed his name to Walter Bonn and appeared in stage productions on Broadway including the play, "We Are No Longer Children (March 31, 1932, to April 1932), in which he played the role of 'La Vattier.' During his time on the stage, he worked with the likes of Diane Bori, Spring Byington, George Dill, Gertrude Fowler, Geoffrey Kerr, Freya Leigh, Edward Mendelssohn, Frederick Roland, Harold Vermilyea, June Walker, Wallace Widdicombe, and H.N. Worth. He eventually moved to Los Angeles, California, at some point and made the transition to films. He made his actual film debut playing the role of 'Radio Announcer' in the romance film drama, "Glamour" (1935), which was directed by William Wyler, and which also starred Paul Lukas, Constance Cummings, and Phillip Reed. Besides, "Glamour" (1935), and "International Crime" (1938), his many other film credits include, "The Florentine Dagger" (1935), "The Man Who Broke The Bank At Monte Carlo" (1935), "Espionage" (1937), "Thin Ice" (1937), "Charlie Chan At The Olympics" (1937), "The Emperor's Candlesticks" (1937), "Lancer Spy" (1937), "The Girl At The Golden West" (1938), "Three Comrades" (1938), "Cipher Bureau" (1938), "Confessions Of A Nazi Spy" (1939), "Bridal Suite" (1939), "Pack Up Your Troubles" (1939), "Florian" (1940), "The Man I Married" (1940), "Public Deb No. 1" (1940), "Escape" (1940), "Man Hunt" (1941), "Underground" (1941), "The Deadly Game" (1941), "Eagle Squadron" (1942), "Desperate Journey" (1942), "Once Upon A Honeymoon" (1942), "Assignment In Brittany" (1943), "Above Suspicion" (1943), "Hitler's Madman" (1943), "Background To Danger" (1943), "Appointment In Berlin" (1943), "We've Never Been Licked" (1943), "Sahara" (1943), "Paris After Dark" (1943), "The Cross Of Lorraine" (1943), "Around The World" (1943), "Passage To Marseille" (1944), "The Conspirators" (1944), "A Song To Remember" (1945), "Jungle Queen" (1945), "Hotel Berlin" (1945), "The Master Key" (1945), "Counter-Attack" (1945), "Where Do We Go From Here?" (1945), "The Razor's Edge" (1946), "All My Sons" (1948), and "Letter From An Unknown Woman" (1948). He also played the role of 'Warden Dawes' in the episode entitled, "The Sheriff's Son," in the classic western television series, "The Lone Ranger," which originally aired on February 19, 1953. This was his only television appearance. His last role was playing 'Mr. Carstairs' in the mystery film drama, "Problem Girls" (1953), which was directed by Ewald André Dupont, and which also starred Helen Walker, Ross Elliott, and Susan Morrow. He was buried in Valhalla Memorial Park in North Hollywood, California, in an unmarked grave. He became a naturalized United States Citizen on October 18, 1940. He never married nor any children.